Alternative Materials for RoHS—The_Implications_of_RoHS_compliances.ppt

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2018-02-11 发布于江西
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Alternative Materials for RoHS—The_Implications_of_RoHS_compliances.ppt

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Alternative Materials for RoHS—The_Implications_of_RoHS_compliances

Alternative Materials for RoHS Speaker : Professor Y.C. Chan PhD, FIEEE, FHKIE, FIEE, CEng Chair Professor of Electronic Engineering, City University of Hong Kong Director, EPA Centre Acknowledgement Mr. Paul Yao of Intertek Labtest Microsoft Home Entertainment Division What is the meaning of RoHS ? EU Directive 2002/95/EC of the European Parliament and of the council on the Restriction of the use of certain Hazardous Substances ( RoHS ) in electrical and electronic equipment Why Important ? $ Dutch Government blocked the shipment of 1.3M Sony Playstation system, 800K accessories - combined value of over US $200M in 2001. Cadmium in cables exceeds 0.01% limit by 3 – 20x. Health Fears Media reported that over 100 workers in two Chinese battery factories ( Huizhou, Southern China ) were suspected to be contaminated by cadmium in July 2004. Medical report states “ excessive levels of cadmium in blood” . Summary on related directives Summary on related directives Which materials are banned ?( Directive 2002/95/EC ) Lead (Pb)- Used in virtually all solders, electronic components and many PWB’s. Cadmium (Cd)- Used in batteries (NiCd), plastic stabilizers, platings. Mercury (Hg)-Used in some electrical components, batteries, pigments. Hexavalent chromium (Cr6+)- Used in dyes, pigments, plating solutions, alloys. Polybrominated biphenyls (PBB) Polybrominated diphenyl ethers (PBDE) - Both PBB and PBDE are used as flame retardants in plastics, PWB insulation. Effective from 1 July 2006. Exceptions to RoHS(All exceptions will be reviewed every 4 years or less) 1. Lead: in the glass of cathode ray tubes in certain steel (0.35%), aluminum (0.4%) and copper alloys ( 4%) in high melting temperature type solders in solders for servers and Storage Arrays (Until 2010) Lead in solders for network infrastructure equipment in electronic ceramic parts (i.e. piezoelectric components) 2. Mercury: in some lighting applications 3. Cadmium: Cd plating 4. Hexavalent chromium in